Abstract

We have performed reflectivity measurements on one-dimensional, halogen-bridged, mixed-valence compounds, regarding, in particular, the far-infrared energy range. The ir-active phonon modes are investigated and a tentative assignment proposed, with the help of a phenomenological lattice-vibrational calculation. Furthermore, the connection between our experimental data and a theoretical model is presented, based on the Peierls-Hubbard approach.

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